<nz-radio-group [(ngModel)]="value">
  <label nz-radio [nzValue]="'a'">A</label>
  <label nz-radio [nzValue]="'b'">B</label>
  <label nz-radio [nzValue]="'c'">C</label>
  <label nz-radio [nzValue]="'d'">D</label>
</nz-radio-group>
<br />

<nz-radio-group [(ngModel)]="value2">
  <label nz-radio [nzValue]="'a'">A</label>
  <label nz-radio [nzValue]="'b'">B</label>
  <label nz-radio [nzValue]="'c'">C</label>
  <label nz-radio [nzValue]="'d'">D</label>
</nz-radio-group>
